y mandy clark in kandahar, afghanistan's most dangerous city. she comes under attack while wearing a berka. >> reporter: another stone was just thrown at me-- ow! >> just today the city's mayor was assassinated in a brazen attack. cell phone safety-- to all those minutes add up to health problems for kids? dr. jon lapook reports. and it's a place where wounded warriors learn to hope again. david martin on the closing of walter reed. captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> schieffer: exwfg. scott's off tonight. i'm bob schieffer. the fallout from washington's inability to find a solution to the budget crisis and raise the debt limit has, apparently, begun. on wall street, the stock market was down for the third day in a row. the dow fell more than 198 point today. for the week, it's down nearly 400 point, and it has lost close to $105 billion in value. some of the bond rating services are now saying that even if congress does reach an agreement on a budget plan, it may be too hate to avoid lowering the rat